haskell.compiler.ghc865Binary: drop

doc/release-notes/rl-2511.section.md

@@ -24,6 +24,8 @@
 
 - GCC 9, 10, 11, and 12 have been removed, as they have reached end‐of‐life upstream and are no longer supported.
 
+- GHC 8.6.5 and its package set have been removed. It was only used to bootstrap GHC for powerpc64le, but this was probably broken anyway.
+
 - `base16-builder` node package has been removed due to lack of upstream maintenance.
 
 - `python3Packages.bjoern` has been removed, as the upstream is unmaintained and it depends on a 14-year-old version of http-parser with numerous vulnerabilities.

pkgs/development/haskell-modules/generic-builder.nix

@@ -957,7 +957,7 @@ lib.fix (
         #   # and with python:
         #
         #   > nix-shell -E 'with (import <nixpkgs> {}); \
-        #   >    haskell.packages.ghc865.hello.envFunc { buildInputs = [ python ]; }'
+        #   >    haskellPackages.hello.envFunc { buildInputs = [ python ]; }'
         envFunc =
           {
             withHoogle ? false,